US8047611B2 - Headrest bushing and vehicle seat using the same - Google Patents

Headrest bushing and vehicle seat using the same Download PDF

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Publication number
US8047611B2
US8047611B2 US11/643,932 US64393206A US8047611B2 US 8047611 B2 US8047611 B2 US 8047611B2 US 64393206 A US64393206 A US 64393206A US 8047611 B2 US8047611 B2 US 8047611B2
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US
United States
Prior art keywords
headrest
button
housing
stay
lock mechanism
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Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
Application number
US11/643,932
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English (en)
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US20070145804A1 (en
Inventor
Morihiro Ichisugi
Daijiro Terashima
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
NHK Spring Co Ltd
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NHK Spring Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by NHK Spring Co Ltd filed Critical NHK Spring Co Ltd
Assigned to NHK SPRING CO., LTD. reassignment NHK SPRING CO., LTD. ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: ICHISUGI, MORIHIRO, TERASHIMA, DAIJIRO
Publication of US20070145804A1 publication Critical patent/US20070145804A1/en
Application granted granted Critical
Publication of US8047611B2 publication Critical patent/US8047611B2/en
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60N—SEATS SPECIALLY ADAPTED FOR VEHICLES; VEHICLE PASSENGER ACCOMMODATION NOT OTHERWISE PROVIDED FOR
    • B60N2/00—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles
    • B60N2/80—Head-rests
    • B60N2/806—Head-rests movable or adjustable
    • B60N2/809—Head-rests movable or adjustable vertically slidable
    • B60N2/812—Head-rests movable or adjustable vertically slidable characterised by their locking devices
    • B60N2/818—Head-rests movable or adjustable vertically slidable characterised by their locking devices with stepwise positioning
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60N—SEATS SPECIALLY ADAPTED FOR VEHICLES; VEHICLE PASSENGER ACCOMMODATION NOT OTHERWISE PROVIDED FOR
    • B60N2/00—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles
    • B60N2/80—Head-rests
    • B60N2/897—Head-rests with sleeves located in the back-rest for guiding the rods of the head-rest

Definitions

  • the present invention relates to a vehicle seat, and more particularly to a headrest bushing into which a headrest stay is inserted for supporting a headrest of the headrest stay.
  • a headrest is generally installed in a vehicle seat for an automotive to improve safety of an occupant from an accident such as collisions between vehicles.
  • This headrest possesses a height adjusting mechanism so that an arbitrary point can adjust height location by a physical constitution and preference of an occupant.
  • two headrest stays are adhered to the headrest.
  • the headrest stays are inserted into two headrest bushing anchored at the side of the seat back respectively and then supported.
  • a head impact force of an occupant seating on a seat becomes a load in the case of a collision, thus the force that is going to depress the headrest is exerted. Due to the force exerted, the headrest moves to the lower portion, an occupant's head cannot be supported, and the security of safety for the occupant is difficult because the headrest is not in condition that the occupant's head is not completely covered. Therefore, a vehicle seat with a height adjusting mechanism is provided in one of headrest bushings in support of the headrest stays (Japanese Patent Laid-Open No. 1992-193109 Official Gazette). The height adjusting mechanism permits a movement to the upper portion of the headrest, but the movement to the lower portion comes to be locked, and a button to release the lock is provided therefor.
  • FIG. 10 depicts an exploded perspective view showing the vehicle seat.
  • the numeral 1 of FIG. 10 depicts a seatback
  • 2 of FIG. 10 depicts a headrest
  • 3 a and 3 b are designated as headrest stays in support of a headrest 2 .
  • the numerals 6 a and 6 b of FIG. 10 are designated as headrest bushings into which a headrest stay 3 is inserted and is supported.
  • a height adjusting mechanism 7 which allows the movement to the upper portion of the headrest stay 3 a and prevent the movement to the lower portion, is installed freely in advance or retreat in a perpendicular direction to the headrest stay 3 .
  • the height adjusting mechanism 7 is formed by an abutting lock plate 8 in contact with the headrest stay 3 a , and a spring 12 (not shown). An outside of the height adjusting mechanism 7 is covered by a housing 13 , a button 8 b of the abutting lock plate 8 is only exposed to the outside.
  • the headrest stay 3 a is provided with height adjusting notch 4 in a predetermined space (hereinafter referred to as a “height adjusting notch”).
  • the height adjusting notch 4 is formed by a horizontal surface 4 a toward the center of the headrest stay 3 a , and an inclined surface 4 b to increase the diameter of slowly downward from a deepest portion of the horizontal surface 4 a .
  • the height adjusting mechanism 7 by pulling the headrest 2 upward an abutment 8 a in contact with the headrest stay 3 a of the lock plate 8 is disengaged from the height adjusting notch 4 against an elastic force of a spring 12 by action of the incline surface 4 b of the height adjusting notch 4 .
  • the headrest 3 a is movable upward, and the headrest 2 can be adjusted in its height.
  • the lock plate 8 is not disengaged from the height adjusting notch 4 in engagement with a horizontal surface 4 a of the height adjusting notch 4 when the headrest 2 is pushed downward.
  • a falling-off preventive mechanism is arranged to the headrest bushing in a free state for preventing the headrest stay from falling-off, the falling-off preventive mechanism is also provided in the inside of the seatback (U. S. patent application publication US2005/200185).
  • the headrest stay is inserted into the two headrest bushings, one of which is in a free state without having any of mechanisms according to the vehicle seat in Japanese Patent Laid-Open No. 1992-193109 Official Gazette. Therefore, the headrest is disengaged from the seatback easily when an upward force acts on the headrest (for example, it may be contemplated in the case that an occupant pulls the headrest out).
  • a vehicle seat comprising: a locking mechanism for stopping the movement to the upper portion of the headrest stay and for preventing disengagement of the headrest, and a mechanism having a locking/unlocking mechanism (hereinafter referred as to a “falling-off preventive mechanism”).
  • FIG. 11 shows a main exploded perspective view of a vehicle seat having the headrest comprising the falling-off preventive mechanism. All of the components which occur identically in FIG. 10 have the same reference numerals respectively, a description on the components is omitted.
  • the numeral 5 of FIG. 11 is designated as a notch for preventing the headrest 2 from falling-off (hereinafter referred as to a “falling-off preventive notch”), the numeral 9 is the falling-off preventive mechanism, and the numeral 10 b is an operating button for unlocking the falling-off preventive mechanism 9 .
  • the headrest bushing 6 b is embedded in the inside of the seatback 1 , and the falling-off preventive mechanism 9 has a construction to be installed in the upper portion in the form protruded outside from the seatback 1 .
  • the falling-off preventive mechanism 9 is installed freely in advance or retreat in the perpendicular form to the headrest stay 3 b .
  • the headrest stay 3 b is inserted through the falling-off preventive mechanism 9 .
  • the falling-off preventive mechanism 9 comprises the lock plate 10 and the spring 12 (not shown).
  • the lock plate 10 comprises a button 10 b to unlock an abutment (not shown) in contact with the headrest stay 3 b .
  • the falling-off preventive notch 5 is formed by a horizontal surface 5 a , and an inclined surface 5 b to increase the diameter slowly upward from the deepest portion of the horizontal surface 5 a .
  • the abutment (not shown) of the lock plate 10 engages the horizontal surface 5 a of the falling-off preventive notch 5 . This allows to lock the movement to the upper portion of the headrest stay 3 b .
  • the button 10 b for unlocking the locked headrest stay 3 b is exposed to the outside of the housing to accommodate the falling-off preventive mechanism 9 . Accordingly, even supposing that the occupant merely touches, if the button 10 b is pushed, the locked movement to the upper portion of the headrest 2 may be sufficiently unlocked. Even though the lock may be unlocked with such a mere touch, the headrest may be disengaged when the occupant does not intend, and a dangerous situation also may occur.
  • the present invention is to provide the headrest bushing having the headrest 2 not dislocated from the seatback 1 and the vehicle seat therewith, if the invention is performed, not by an intentional action forcing the headrest 2 to be disengaged from the seatback 1 .
  • an unlock mechanism having a button for unlocking said lock mechanism and a housing for accommodating said lock mechanism, which has an opening for manipulating said button;
  • a vehicle seat comprising a seatback and a headrest, said headrest comprising:
  • a first and second headrest stays for supporting said headrest main body
  • said first headrest bush comprising:
  • a vehicle seat comprising a seatback and a headrest, said headrest comprising:
  • a first and second headrest stays for supporting said headrest main body
  • said first headrest bush comprising:
  • said second headrest bushing comprising:
  • FIG. 1 is a perspective view showing headrest bushings and one preferred embodiment of a vehicle seat of the present invention.
  • FIG. 2 is a main exploded perspective view showing the headrest bushings and a preferred embodiment of a vehicle seat according to the present invention.
  • FIG. 3 is a partial cutaway perspective view of a height adjusting mechanism showing a preferred embodiment according to the invention.
  • FIG. 4 is a partial cutaway perspective view of a disengagement preventive mechanism showing a preferred embodiment according to the invention.
  • FIG. 5 is a perspective view showing a detailed description of a preferred embodiment of the present invention which is in a state covered by a housing.
  • FIG. 6A and FIG. 6B are sectional views which cut away the disengagement preventive mechanism of FIG. 5 with line a-a′, respectively.
  • FIG. 7 is an exploded perspective view showing a preferred embodiment according to the invention.
  • FIG. 8 is a perspective view showing other detailed description of a preferred embodiment of the present invention which is in a state covered to a housing.
  • FIG. 9A , FIG. 9B and FIG. 9C are sectional views which cut away the disengagement preventive mechanism of FIG. 8 with b-b′, respectively.
  • FIG. 10 is a main exploded perspective view showing a vehicle seat comprising only a conventional height adjusting mechanism.
  • FIG. 11 is a main exploded perspective view showing the vehicle seat comprising a conventional falling-off preventive mechanism.
  • FIG. 10 and 11 have the same numeral, a description is made.
  • FIG. 1 depicts a perspective view showing a preferred embodiment according to the invention.
  • the numeral 1 of FIG. 1 depicts a seatback
  • 2 of FIG. 1 may be described as a headrest main body, the main body (hereinafter merely referred as to a “headrest”) forming a headrest body according to this embodiment of the invention
  • 3 a and 3 b are designated as headrest stays.
  • FIG. 2 depicts a main exploded perspective view showing a preferred embodiment according to the invention.
  • the numeral A of FIG. 2 depicts a headrest portion comprising of a headrest 2 , headrest stays 3 a and 3 b , and headrest bushings 6 a and 6 b .
  • the numeral B of FIG. 2 is designated as a seatback.
  • the headrest stays 3 a and 3 b are supported to be inserted into the headrest bushings 6 a and 6 b in the form of tube anchored at the upper end position of a seatback 1 .
  • the headrest bushings 6 a and 6 b are fixedly mounted to the seatback frame 11 of the seatback 1 as shown in FIG. 7 . More particularly, a tube-shaped mounting member 14 is connected to a seatback frame 11 , and is fixed to be inserted into the mounting member 14 . In the headrest bushings 6 a and 6 b one of the headrest bushings 6 a has the height adjusting mechanism 7 , and a disengagement preventive mechanism 21 is arranged to the other. By the height adjusting mechanism 7 the headrest 2 (the headrest stay 3 a ) are halted (held) at a given height, and by the disengagement preventive mechanism 21 the headrest 2 (the headrest stay 3 b ) is composed for prevention of falling-off.
  • disengagement preventive mechanism herein called is the mechanism comprising: a locking mechanism for preventing disengagement of the headrest stay 3 b inserted into the headrest bushing 6 b , a button for unlocking the locking mechanism, and an unlocking mechanism having a housing to accommodate the button.
  • the height adjusting mechanism 7 is arranged to the upper end of the seatback 1 of the headrest bushing 6 a .
  • FIG. 3 depicts a partial cutaway perspective view of the height adjusting mechanism 7 .
  • the height adjusting mechanism 7 in FIG. 3 is described in detail.
  • the lock plate 8 as a locking member to the headrest bushing 6 a is attached in advance or retreat in a perpendicular direction to the headrest stay 3 a .
  • the headrest stay 3 a passes through the lock plate 8 to be inserted into the headrest bushing 6 a .
  • the headrest stay 3 a has the space that the lock plate 8 can move (translate back and forth) therebetween, a portion 8 a of the lock plate 8 is abutted on the perforated headrest stay 3 a by a resilience of the spring 12 .
  • the lock plate 8 and the spring 12 are accommodated in the housing 13 , and only the button 8 b of the lock plate 8 is protruded. It may be allowed to unlock the lock plate 8 by the mere pushing of the button 8 b .
  • a plurality of the height adjusting notches 4 are arranged in a predetermined space.
  • the height adjusting notches 4 are formed of the horizontal surface 4 a toward the center of the headrest stay 3 a , and an inclined surface 4 b to increase the diameter of slowly downward from the deepest part of the horizontal surface 4 a.
  • an abutment 8 a in touch with the headrest stay 3 a of the lock plate 8 is disengaged from the height adjusting notches 4 against an elastic force (a spring force) of the spring 12 by action of the incline surface 4 b of the height adjusting notches 4 , so that the headrest stay 3 a is movable upward, and the headrest 2 adjustable in its height.
  • the horizontal surface 4 a of the height adjusting notches 4 engage the lock plate 8 to be locked and halted in place.
  • the lock plate 8 is not disengaged from the height adjusting notches 4 in engagement with a horizontal surface 4 a of the height adjusting notches 4 when the headrest 2 is pushed downward.
  • the button 8 b of the lock plate 8 is pushed, then the lock is unlocked, the movement may be available to the lower portion of the headrest stay 3 a , so that the headrest 2 can be regulated downward.
  • FIG. 4 depicts partial cutaway perspective view of the disengagement preventive mechanism.
  • the disengagement preventive mechanism 21 is arranged on an upper end position of the seatback 1 of the headrest bushing 6 b .
  • the disengagement preventive mechanism 21 has a generally same construction as the height adjusting mechanism 7 , but there is a difference in which the falling-off preventive notch 5 is arranged in the lower portion of the inserted headrest stay 3 b . That is, in the disengagement preventive mechanism 21 , as shown in FIG. 4 , the lock plate 22 as a locking member to the headrest bushing 6 b is attached in advance or retreat in a perpendicular direction to the headrest stay 3 b .
  • the headrest stay 3 b passes through the lock plate 22 to be inserted into the headrest bushing 6 b .
  • a portion that the headrest stay 3 b passes through the lock plate 22 has a space for allowing the lock plate 22 to move front and back between the headrest stay 3 b and the lock plate 22 .
  • a portion 22 a of the lock plate 22 is abutted on the perforated headrest stay 3 b by a resilience of the spring 12 .
  • the lock plate 22 and the spring 12 are accommodated in the housing 20 .
  • the button 22 b formed a part of the lock plate 22 , it may be allowed to unlock the lock plate 22 .
  • the falling-off preventive notch 5 is arranged to the lower portion of the headrest stay 3 b .
  • the falling-off preventive notch 5 is formed of the horizontal surface 5 a toward the center of the headrest stay 3 b , and an inclined surface 5 b to increase the diameter slowly upward from the deepest part of the horizontal surface 5 a.
  • the headrest stay 3 b is free to move up and down.
  • the lock plate 22 engages the falling-off preventive notch 5 , thereby locking the horizontal surface 5 a and preventing the up and down movement, so that the headrest stay 3 b is not able to move up and down anymore, thereby allowing the headrest 2 to be prevented from falling-off.
  • the lock plate 22 can be unlocked by the pushing of the button 22 b .
  • the pressing force is required such that the engagement between the lock plate 22 and the horizontal surface 5 a of the falling-off preventive notch 5 is disengaged.
  • the lock plates 8 and 22 can be pressed and moved to unlock the engagement (lock) with the height adjusting notches 4 and the falling-off preventive notch 5 . Accordingly, the space is required when unlocking from the height adjusting notches 4 of the lock plates 8 and 22 , and the falling-off preventive notch 5 .
  • the abutment 8 a in touch with the headrest stay 3 a of the lock plate 8 is disengaged from the height adjusting notch 4 against an elastic force of the spring 12 by action of the incline surface 4 b of the height adjusting notch 4 , so that the headrest stay 3 a is movable upward, and the headrest 2 adjustable in its height.
  • the lock plate 8 is not disengaged from the height adjusting notches 4 in engagement with the horizontal surface 4 a of the height adjusting notches 4 when the headrest 2 is pushed downward.
  • the height adjusting mechanism 7 of this embodiment of the invention can adjust its height by pulling the headrest 2 upward; the lock plate 8 may be unlocked by pushing the button 8 b to be thereby depressed downward.
  • the control button 8 b is located on the upper end of the seatback, which can be easily manipulated.
  • FIG. 5 shows a perspective view of the housing 20 that accommodates the lock plate 22 and the spring 12 of the falling-off preventive mechanism 21 .
  • the portion having an opening surface of the housing 20 may be referred as to an “opening”. This allows the button 22 b to be manipulated.
  • FIG. 6A and FIG. 6B is a sectional view which cuts away the housing 20 accommodating the lock plate 22 and the spring 12 of the falling-off preventive mechanism 21 with line a-a′.
  • the abutment 22 a which is a portion of the lock plate 22 in contact with the headrest stay 3 b , is located, and on the right upper end of the headrest bushing 6 b the button 22 b is located for unlocking the horizontal surface 5 a of the falling-off preventive notch 5 arranged to the lock plate 22 and the headrest stay 3 b .
  • FIG. 6A and FIG. 6B can be seen in the state having the lock plate 22 separated in right and left sides due to the fact that FIG.
  • FIG. 6A is a view showing the state that the surface of the button 22 b of the lock plate 22 corresponds to the opening of the housing 20 .
  • FIG. 6B is a view showing the state that the surface of the button 22 b of the lock plate 22 was placed inwardly in a pressing direction from the opening of the housing 20 .
  • the headrest 2 can be pulled out by the pushing of the button 22 b of the lock plate 22 for unlocking. More particularly, when the headrest 2 is pulled out, the lock plate 22 is unlocked by the pushing of the button 22 b for raising the headrest 2 to the most subjacent notch 4 among a plurality of the height adjusting notches 4 of the headrest stay 3 a in this embodiment of the present invention. This work can be manipulated with one hand. Next, the most subjacent notch 4 is unlocked, and the headrest 2 is raised to the falling-off preventive notch 5 of the headrest stay 3 b in this embodiment of the invention. This work can also be manipulated with one hand.
  • the headrest 2 is unlocked by the pushing of the button 22 b formed a portion of the lock plate 22 with another hand, and is removed.
  • the numbers of the notches are not limited to the above-mentioned numbers.
  • the falling-off preventive mechanism 21 is arranged to the upper end of the seatback 1 as shown in FIG. 1 and FIG. 2 , unlikely a conventional vehicle seat that the falling-off preventive mechanism 9 is arranged in the inside of the seatback 1 , and it allows to work easily when the headrest is removed from the seatback upon cleaning up or maintenance.
  • the position that the falling-off preventive notch 5 of the headrest stay 3 b of the headrest 2 reaches and locks the position of the lock plate 22 corresponds to the position that the lock plate 8 is locked to the most subjacent height adjusting notch 4 of the headrest stay 3 a in the height adjusting mechanism 7 , when the falling-off preventive mechanism 21 locks the headrest 2 to be pulled out upward, even if an external force is removed, the headrest 2 is preferable to hold its position.
  • the locking mechanism and the unlocking mechanism for preventing disengagement from the seatback of the headrest are covered by the housing with the opening, the button should be pushed at the strength of the extent allowing to be unlocked. In this is manner, it would not allow to unlock without implementing a human intentional work.
  • FMVSS Federal Motor Vehicle Safety Standards
  • FIG. 8 depicts a vehicle seat of the other embodiment according to the present invention.
  • the numeral 30 of FIG. 8 depicts the housing covering the disengagement preventive mechanism 21
  • 32 b depicts a button for unlocking the lock plate 32 of the disengagement mechanism 21 .
  • the housing 30 has an opening for opening the surface opposed to the pressing surface of the button 32 b of the lock plate 32 .
  • the surface of the button 32 b is arranged in a pressing direction from the opening of the housing 30 , in other words, at the inside of the housing 30 (including the housing that corresponds to the opening of the housing 30 ).
  • this embodiment of the present invention only differs in the housing of the disengagement preventive mechanism and the shape (width dimension) of the locking member, and other component uses the same member as same as the embodiment 1 is used, the description of which is omitted.
  • FIG. 9A depicts a sectional view of the disengagement preventive mechanism for use in a conventional vehicle seat as shown in FIG. 10 .
  • FIG. 9B depicts a sectional view of the disengagement preventive mechanism of the embodiment 1 according to the present invention described above.
  • FIG. 9C depicts a sectional view of the disengagement preventive mechanism which cuts away with line b-b′ of FIG. 8 of this embodiment 3 according to the present invention.
  • the width dimension of the housing 30 is identical as the housing mounted to a conventional disengagement preventive mechanism, but the lock plate 32 is shorter in its width dimension than a conventional locking member 12 .
  • the lock plate 32 b may not be unlocked unless the button 32 b is intentionally pushed.
  • the vehicle seat according to the present invention can be applied to not only a motor vehicle but also other vehicle such as a railway and an airplane. Additionally, the headrest bushing according to the invention can be applied to not only a vehicle seat but also other vehicle seat.

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  • Engineering & Computer Science (AREA)
  • Aviation & Aerospace Engineering (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Seats For Vehicles (AREA)
  • Chair Legs, Seat Parts, And Backrests (AREA)
US11/643,932 2005-12-26 2006-12-22 Headrest bushing and vehicle seat using the same Expired - Fee Related US8047611B2 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2005373544A JP4580337B2 (ja) 2005-12-26 2005-12-26 ヘッドレストブッシュ及びそれを用いた車両用シート
JP2005-373544 2005-12-26

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US20070145804A1 US20070145804A1 (en) 2007-06-28
US8047611B2 true US8047611B2 (en) 2011-11-01

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Cited By (2)

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Publication number Priority date Publication date Assignee Title
US20100230573A1 (en) * 2008-09-16 2010-09-16 Friedhelm Pausch Support tube for motor-vehicle accessory and method and apparatus for making a recess therein
US20110025116A1 (en) * 2008-06-13 2011-02-03 I.T.W. De France Head-rest guiding sleeve with security unlocking

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Publication number Priority date Publication date Assignee Title
DE102004020913B3 (de) * 2004-04-28 2005-09-22 Johnson Controls Gmbh Fahrzeugsitz mit Abdeckblende
JP2015208438A (ja) * 2014-04-25 2015-11-24 トヨタ紡織株式会社 乗物用シート
JP6513967B2 (ja) * 2015-02-26 2019-05-15 日本発條株式会社 ヘッドレスト装置
EP3315355B1 (en) * 2016-10-26 2021-12-08 Volvo Car Corporation A vehicle seat and a head rest for a vehicle seat
JP6768565B2 (ja) * 2017-03-10 2020-10-14 日本発條株式会社 ヘッドレスト支持構造

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JPS5022417A (ja) 1973-07-03 1975-03-10
JPH0292744A (ja) 1988-09-29 1990-04-03 Aisin Seiki Co Ltd 車速自動制御装置
JPH04193109A (ja) 1990-11-26 1992-07-13 Nissan Motor Co Ltd シートのヘッドレスト上下調整装置
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US20100230573A1 (en) * 2008-09-16 2010-09-16 Friedhelm Pausch Support tube for motor-vehicle accessory and method and apparatus for making a recess therein
US9132470B2 (en) * 2008-09-16 2015-09-15 Grammer Ag Support tube for motor-vehicle accessory and method and apparatus for making a recess therein

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US20070145804A1 (en) 2007-06-28
JP2007175080A (ja) 2007-07-12
JP4580337B2 (ja) 2010-11-10

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